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Mar 29, 2006, 09:56 PM
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#1
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ARP Head Studs a Requirement?
Just wondering if everybody who runs alky kits here put arp head studs on no matter what or if they wait and put them on later; but just run a lower boost setting.
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Mar 29, 2006, 10:28 PM
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#2
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I think the W/I systems don't really necessitate head fastener upgrade. RPM/HP levels dictate so.
We'll see once others chime in.
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Mar 30, 2006, 08:00 AM
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#3
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Meth actually lowers cyl pressure, however most usually run meth to bump up the boost and timing that increase it once again.
At about 375whp I would move to studs.
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Mar 30, 2006, 09:07 AM
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#4
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Mar 30, 2006, 09:55 AM
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#5
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There you go, Methanol Injection doesn't directly require stud upgrade, but since HP drastically increases with it (WI), so does the force on the studs.
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Mar 30, 2006, 11:56 AM
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#6
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Is there no difference between the VIII and IX studs? Would think with all the upgrades on the IX that they would include upgraded studs as well.
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Mar 30, 2006, 04:37 PM
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#7
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I don't think studs are required if you are just doing injection...I'm going to do mine with my cams/valvetrain.
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Mar 30, 2006, 07:28 PM
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#8
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So would it be safe to asume that once your WHP hits 375, not to mention RPM at 8000 rod bolts, the studs become under termendous stress - more than stock ones can handle.
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Mar 30, 2006, 07:37 PM
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#9
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not something I want to find out the hard way...
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Mar 30, 2006, 07:43 PM
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#10
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Quote:
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Originally Posted by poohlvhun
not something I want to find out the hard way...
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+1 gonna put the studs on to be on the safe side.
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Mar 30, 2006, 08:56 PM
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#11
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Studs are a good pre-caution at any stage..but not a necessity til later 
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Mar 31, 2006, 11:54 AM
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#12
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so i guess they would be strongly recommended for an evo with 100% meth injection, 272's, boost control, etc (around 375-400 awhp) huh?
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Mar 31, 2006, 12:34 PM
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#13
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just to be in the safe side you rather put them on. You dont know dont the road your stock studs dont hold the HP you got and they might give up. Thats more money now if something happens to your engine. Rather be safe than sorry.
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Mar 31, 2006, 01:35 PM
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#14
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Does the factory service manual provide sufficient data for the R/R procedure?
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Mar 31, 2006, 03:49 PM
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#15
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Quote:
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Originally Posted by C6C6CH3vo
Does the factory service manual provide sufficient data for the R/R procedure?
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No, 1x1 method is an unorthodox procedure that you will find acceptable no where.
We do it however along with many others.
__________________
2005 Evolution VIII MR
763whp/595tq HTA86
10.19 & 143.3mph stock ECU
Factory ECU Expert
2008 Evolution X GSR
12.0@113mph Full Wt+
In House Mustang Dyno AWD-500!
www.ttp-engineering.com
(407) 475-0010
AIM=TTPEngineering
MODIFYING THE 4G63 SINCE 1995, YES 14 YEARS!
TUNING EVO V - EVO X & 2009 RALLIART!
TTP's Myspace page!
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